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AHCI vs. IDE Modes With A SATA 3.0 SSD On Linux

08-05-2012, 12:10 PM

Phoronix: AHCI vs. IDE Modes With A SATA 3.0 SSD On Linux

Days ago benchmarks were shared from OpenBenchmarking.org that compared AHCI and IDE modes under Linux when it came to the resulting disk performance. There was a fair amount of interest generated out of that so some AHCI vs. IDE mode comparisons from a Serial ATA 3.0 SSD on an Ubuntu Linux host were benchmarked at Phoronix.

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What I've often wondered is if any additional tweaks are needed when running an SSD with 12.04. Seems to be a lot of conflicting information out there as to what to do to "preserve life" and "increase performance." I know Windows 7 identifies an SSD and configures it differently than an HDD, but I've always wondered what the Linux distros do.

Comment

What I've often wondered is if any additional tweaks are needed when running an SSD with 12.04. Seems to be a lot of conflicting information out there as to what to do to "preserve life" and "increase performance." I know Windows 7 identifies an SSD and configures it differently than an HDD, but I've always wondered what the Linux distros do.

Align the sectors, enable trim, keep additional free space to trim and wear leveling actually have the chance to work. Everything else is just sort of gravy. Moving swap into tempfs or zCache is great if you have the RAM to do it.

Comment

Align the sectors, enable trim, keep additional free space to trim and wear leveling actually have the chance to work. Everything else is just sort of gravy. Moving swap into tempfs or zCache is great if you have the RAM to do it.

I've actually disabled swap with seemingly no ill effects. I have 8GB of RAM and usually sit around 1.5-2.0GB usage under normal conditions.